The Lakes District Health Board's computer network system is back up and running after a fire at Rotorua Hospital caused a major outage earlier this week.
However, staff are only able to view the two main patient management systems, and further outages are anticipated. The full recovery from the outage is expected to take months.
Paper-based, manual systems are still being used, until all the clinical data from this week can be entered into the system.
The manual systems of recording patient information will continue until the data has been entered.
Incident controller Gary Lees, who is the director of nursing and midwifery, said staff had been warned there could still be failures in the system, and that there was a great deal of work to be done to fully restore the network and patient management systems.